The invention provides intrafallopian devices and non-surgical methods for their placement to prevent conception. A snapshot acquisition control program detects the checkpoint process externally to the DBMS and creates a snapshot in an external storage according to the timing of the checkpoint. Therefore, the composition exerts a high protection effect against light reflection, and has a high dry etching rate compared with photoresist layers. The support structure also includes at least one pillar disposed in the fluid-filled chamber. The plastic impregnated OSB does not expand or contract with changes in humidity to maintain a planar configuration for the panel with a smooth, uniform surface for exterior finishing. A lower seal member is provided below the intermediate seal member and also effectuates a seal with the shaft.